He told Arsenal Magazine: "Wojciech had exceptional talent and I played him very early, so today he's at an age where most goalkeepers have not started yet, but he already has big experience. He was questioned at some stage and he had a debut that was not very easy, but he has matured earlier than expected because we gave him the chance earlier than expected.

"That's why I think he's ahead of schedule for a normal goalkeeper. It's down to his mental strength and his exceptional talent as well."